With markings including "BAVARIA" and "MADE IN GERMANY", it is clear that "OLD VIENNA" is the series or decoration name. The term "COIN GOLD" normally describes rich, yellow-tinted 22 carat gold. The date "1752", however, is completely meaningless in the context of both German porcelain history and the former Royal Vienna factory.

M060616a
Crown above a meaningless date plus "OLD VIENNA", "BAVARIA" and "MADE IN GERMANY".